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How Wasmer used Codex to build a Node.js runtime for the edge

OpenAI · OpenAI Blog · Jun 03, 2026 · Engineering Insights

Wasmer used OpenAI's Codex with GPT-5.5 to build an edge Node.js runtime 10-20x faster.

OpenAI published a customer case study showing Wasmer used Codex with GPT-5.5 to build a Node.js runtime for the edge, claiming a 10x-20x development acceleration and shipping in weeks rather than months. It signals OpenAI's continued push to position Codex as a force-multiplier for AI-assisted software engineering, though as a vendor-published case study the productivity figures are promotional rather than independently verified.

codex ai-coding developer-productivity gpt-5.5

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